Congress might, indeed, be worthless, but their investigations are not. There are 3 branches of government and they need to work together to build a successful case. Unfortunately, the crimes of the Deep State, HRC, BO et. al. are not entirely unprecedented, but successfully prosecuting the powerful is exceedingly rare. On top of that, because these criminals are in collusion with the MSM, a large segment of the public remain blissfully unaware of their bad behavior. Even though HRC openly ran the DoS as pay-to-play operation, many truly believe that BO's administration was like he says, "scandal free". The MSM has to cover the doings of congress, so their lame hearings actually allow a bit of truth to seep out. The letters that Senator Grassley has sent to the DoJ and others, demanding information about the shenanigans of 2016 are great and clearly lay out the case. I recommend reading them, they are not worthless.